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ZENITH 12A12C52 SPACE COMMAND

zenithsc1
zenithsc1
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   I SCORED THIS NEAR CANTON, OH.  THE ETF PUT ME IN TOUCH WITH THE OWNER.  AS FOUND, IT POWERED UP NICELY.  I WILL ADD MORE FUSING.  I WAS NOT SURE THE TUBE WAS AS STRONG AS THE TESTER SHOWED.  READ ON FOR MORE.  FIRST, SOME PICS.

zenscremote
zenscremote
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 THE REMOTE.  IT WORKS AND DID NOT NEED ANY ADJUSTMENT.  IT IS RARE TO FIND THE ORIGINAL REMOTE .  NEXT UP ARE FIRST SCREEN SHOTS.  IF I REMEMBER RIGHT, THESE WERE FROM FOX 8, CLEVELAND.

zenithsc2
zenithsc2
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zenithsc3
zenithsc3
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 THE MAIN AND REMOTE CHASSIS.

zenithscch
zenithscch
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zenithscrem
zenithscrem
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 DEC. 2011:  I LIED ABOUT NOT HAVING ISSUES.  I THOUGHT THE PICTURE WAS DARKER THAN USUAL.  I HAD TO PUT IT ON THE RIG TO FIND OUT FOR SURE.  HERE'S A BETTER CHASSIS SHOT.

zenith_12a12ch
zenith_12a12ch
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   I WAS ONLY GETTING ABOUT 16kv AT THE ANODE WHEN I SHOULD HAVE HAS ROUGHLY 22kv.  I BEGAN SWAPPING 6HV5 (6HS5) HIGH VOLTAGE REGULATOR TUBES.  ONE OF THEM BEGAN REDPLATING.  I REPACED SOME CAPS I THOUGHT SUSPICIOUS.  NO CHANGE.  I BEGAN CHECKING VOLTAGES.  ON ONE OF THE PINS (I DON'T REMEMBER WHICH, PROBABLY CONTROL GRID), THE VOLTAGE JUMPED TO WHERE IT SHOULD HAVE BEEN.  I FOUND A 1.8m RESISTOR OPEN.  REPLACING THAT FIXED THAT.

  A COLOR ISSUE CROPPED UP.  I WOULD LOSE IT.  TAPPING THE CHASSIS WITH A SCREWDRIVER WOULD BRING IT BACK.  I RESOLDERED ONE OF THE TUBE SOCKETS AND THE COIL NEXT TO IT.  PROBLEM SOLVED.

  I HAD TO RESOLDER THE RF INPUT SOCKET ON THE IF BOARD.  I THEN REASSEMBLED THE SET, DID PURITY, GRAYSCALE AND CONVERGENCE.  THE RESULT IS BELOW.

zenith_12a12_done
zenith_12a12_done
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